31. told... had visited

32. has worked

33. worked

34. build... fly

35. have lost... Can

36. hasn't smoked

37. arrived... has just gone

38. have bob and mary been

39. have you received

40. joined... wass

31. told... had visited

32. has worked

33. worked

34. build... fly

35. have lost... Can

36. hasn't smoked

37. arrived... has just gone

38. have bob and mary been

39. have you received

40. joined... wass

31.    Our teacher (tell) told us yesterday that he (visit)  had visited England in 1970.
32.    George (work) has worked at the university so far.
33.    When he lived in Manchester, he (work) worked in a bank.
34.    Birds ( build) build their nests in summer and (fly) fly to the South in winter.
35.1 (lose) has lost my key. (can) Can you help me look for it?
36.    My father (not smoke) hasn't smoked for 5 years.
37.    My teacher wasn’t at home when I (arrive )arrive . He (just go) has just gone out.
38.    How long  have Bob and Mary (be) been married?
39.    You (receive) received any letter from your parents yet?
40.    My brother (join) joined the army when he (be) was young.